ultraviolet treatment Articles

ABSTRACT This technology report is an overview of information collected by GWRTAC on ultraviolet/oxidation as applied to ex-situ groundwater remediation. Information provided includes an introduction to the principles and techniques associated with this technology, a general discussion of its applicability to remediation, limited cost data relating to results of its use, and advantages and ...

Jan. 1, 1996

By Groundwater Remediation Technologies Analysis Center

Euroby Ltd, the sludge treatment specialists, are pleased to announce the signing of an agreement to be the sole UK and Ireland distributor for the unique UVOX range of water treatment  systems.UVOX, as the name suggests, uses a combination of Ultraviolet and Ozone to treat infected and polluted water.Its uniqueness stems from its novel method of first producing ozone by irradiating air with a ...

Mar. 1, 2008

By Euroby Limited

With retailers under pressure to meet increasing health and safety standards, it’s no surprise that many of our food & products are coming into contact with Ultraviolet (UV) radiation which is gradually becoming common as a cost effective method of reducing or eliminating pathogens Ultraviolet wavelengths are classified into three general areas: UV-A, UV-B and UV-C. These can be used in ...

Jan. 7, 2015

By Alpha-Cure Ltd

The efficient design of ultraviolet light (UV) systems for water and wastewater treatment requires detailed knowledge of the patterns of fluid motion that occur in the disinfection channel. This knowledge is increasingly being obtained using Computational Fluid Dynamics (CFD) software packages that solve the equations governing turbulent fluid-flow motion. In this work, we present predictions of ...

Oct. 1, 2010

By IWA Publishing

KEY WORDS Innovative Treatment, Advanced Oxidation, Reclaimed Water, Ultraviolet light, Peroxide, Disinfection, Microcontaminants INTRODUCTION Many regions of the United States, experiencing rapid population growth and faced with the challenge of meeting increased water demands, are turning to reclaimed water as an alternative water ...

Oct. 13, 2007

By Water Environment Federation (WEF)

When introducing a disinfection product which incorporates new technology, it is essential that the methods and testing used to quantify the performance of those systems follow protocols which are technically sound and which are accepted by the scientific and technical community within the industry. These protocols must be applied precisely and rigorously in order to ensure accurate, repeatable ...

Jun. 27, 2011

By NeoTech Aqua Solutions, Inc.

The NeoTech Aqua ReFleX water purification chambers are the most efficient and compact units  available today. They require an order of magnitude less energy and less than 25% of the system  volume to achieve the same or better purification result as competing chambers. This is the first in a  series of three white papers explaining the benefits of these systems. This paper ...

Jun. 7, 2011

By NeoTech Aqua Solutions, Inc.

The degradation of 2-chloropyridine in synthetic aqueous solutions by means of ultraviolet and ultrasound irradiation has been investigated. The effect of varying operating conditions (initial substrate concentrations from 100–500 mg/l, temperatures from 5–50°C and liquid volumes from 50–500 ml) on degradation efficiency was evaluated. Light irradiation was generally more effective than ...

Sep. 12, 2006

By Inderscience Publishers

Chlorine is the most frequently used chemical for water disinfection. Many industrial and commercial manufacturing facilities cannot tolerate the introduction of chlorine into the process because of contamination and unwanted chemical reactions. Chlorine affects the flavour and odour of drinks and fluids, accelerates corrosion on process vessels and piping, and can also damage delicate process ...

Jun. 21, 2007

By Hanovia Ltd - a Halma Company

Chlorine has been the mainstay of the wastewater disinfection industry for more than 100 years due to its effectiveness, low cost and availability. However, due to various problems associated with chlorine, the Hillsborough County, Florida Water Resource Services Department decided to replace the high-level reuse water chlorine gas disinfection system at the Valrico Advanced Wastewater Treatment ...

Oct. 21, 2006

By Water Environment Federation (WEF)

A procedure is proposed which allows the detection of industrial discharge events at the inlet of a wastewater treatment plant without the need for measurements performed at the industry, for special equipment and for exact knowledge of the industrial sewage. By performing UV/Vis measurements at the inlet of a plant and analyzing them with a two-staged clustering method consisting of the ...

Mar. 1, 2011

By IWA Publishing

In this paper, the effect of suspended flocs on the tailing of ultraviolet (UV) disinfection kinetics of secondary effluents was examined. To achieve this goal, final effluents produced in two processes for treating wastewater; namely, a trickling filter system and an activated sludge system, were collected and their UV disinfection were compared. Tailing of the UV dose response curve was ...

Apr. 25, 2017

By IWA Publishing

The ubiquitous use of antibiotics has led to an increasing number of antibiotic-resistant bacterial strains, including strains that are multidrug-resistant, pathogenic, or both. There is also evidence to suggest that antibiotic resistance genes (ARGs) spread to the environment, humans, and animals through wastewater effluents. The overall objective of this study was to investigate the effect of ...

Sep. 25, 2014

By IWA Publishing

Microcystis aeruginosa forms algal bloom in lakes. They produce toxic compounds such as microcystin. Against such algal problems, the effect of UV treatment was examined. In UV treatment, the effect of photoreactivation should be examined. Photoreactivation is a repair mechanism of genomic DNA damage by sunlight irradiation. UV treatment causes DNA damages on target cyanobacteria, however ...

Mar. 1, 2011

By IWA Publishing

School swimming pools are a valuable asset, and are now present in the majority of high schools and higher education facilities throughout the UK.  Whilst school pools vary in size, shape and usage, many school swimming facilities are facing a common dilemma in their water disinfection strategy.  Existing treatment regimes are often badly designed, under sized or simply outdated, which ...

Oct. 1, 2010

By atg UV Technology

Physicochemical treatment efficiency for unrestricted urban water reuse was evaluated at a conventional activated-sludge wastewater treatment plant (WWTP). Pilot plant set-up consisted of an alum coagulation step, granular media upflow flocculation and direct downflow dual-media filtration followed by ultraviolet disinfection (dose of 95 mJ cm−2). Optimum aluminum sulfate dosage of 10 mg ...

Sep. 25, 2014

By IWA Publishing

The inactivation of Cryptosporidium parvum in finished drinking water by medium-pressure UV light (200-300 nm) has been investigated at both the bench scale, using a collimated beam apparatus, and at the demonstration scale, using a Calgon Carbon Corporation Sentinel™ system at the Mannheim Water Treatment Plant, Kitchener, ON, Canada. The viability of the oocysts was assessed using both in vitro ...

Nov. 1, 1989

By Calgon Carbon Corporation UV Technologies Division

Untitled Document The inactivation of Cryptosporidium parvum in finished drinking water by medium-pressure UV light ...

Jan. 1, 1998

By Calgon Carbon Corporation

Horry County Engineering Department Myrtle Beach, South Carolina, USA Even a single day of beach closure has a major impact on the tourist-dependent economy of beach communities. To reduce beach closures in Myrtle Beach, HDR used ultraviolet (UV) light to treat stormwater runoff to reduce pathogens prior to discharge to the ocean. The system uses disinfection ...

Mar. 22, 2013

Benzotriazoles (BTs) and benzotriazole ultraviolet stabilizers (BUVSs) are commonly used industrial and household chemicals, but little is known about their dissipation behavior in the soil environment associated with biosolid application. This study investigated the occurrence and dissipation of four BTs (BT, 5‐TT, CBT and XT) and five BUVSs (UV‐326, UV‐327, UV‐328, UV‐329 and UV‐P) in ...

Dec. 24, 2013

By John Wiley & Sons, Ltd.